Oil burner



Oct. 16, 1928.

c. M. CLEFTON 011. BURNER Filed'Jan. 21, 1924 Invemlor CL YDE M CLEFTo/v.

ed out in the claims.

Patented oa. 1a 192s.

CLYDE M. CLEFTON, OF AUSTlN,

MfnNnso'rA, Assienon. 'ro FLonnNcE K. oLEFToN, or AUSTIN, MrNNnsoTa f y oIL BURNER.

Application led January 21, 1.924 SerialyNo, 687,544.`

The object of myinvention is to provide an oil burner adapted particularly for heating purposes in the fire-pot of'a: boiler, furnace, or other type of heater.

A further object is toprovide an oil burner in which yprovision isl made for the proper' combustion and a blue burning flame.

A further object is to providea burner 1n which there would be practically no carbon deposits resulting V1n cloggingand necessary cleaning of the burner and one which will be very accurate and reliable in its action and require' practically nov attentionwhenonce it has been properlyinstalled except to supply the necessary fuel. l

JA further object is to provide an air check damper or airvalve that is controlled by the operation of the burner.

` lA further and particular object istov provide improved means'governed by the temperature of the rooms to be heated for regulating the feed of liquid fuel to the burner.

. The invention consists generally in various constructions and combinations all `as hereinafter describedand particularly point- In the accompanying drawings forming part of this specification,

` vFigure 1 is a view ofa conventional form of heater showing the application of my in- V{vention thereto; 'f i Figure 2 is a sectional view'through a por-` tion of the heater illustrating the manner of mounting the burner therein' 1 `Figure 3 isa sectional view on the line 3-3 of Figure 1 showing the position of thevalves in the retort for controlling the'flow ofthev fuel; l i

Y Figure 4 is a detail viewshowing the position ofthe .checkda'mper in the iue;

Figure is a detail sectional view showing j the feed of the liquid fuel to the retort'. l Y

e Inethe drawing, 2 represents a heater having the usual flueB for the products of com-; busti'on 4 represents the grate beloswfthe firel l "pot,V and upon the grate I placca ring `En,.

circling this ringo vis a second ring 6 having: set screws ,7 by mean-s of. `whichitfmay ybe clampedon `the ring 5 indifferent' positions to raise. or lower the ring 6 kas desired. Suitable 'iire'brickl 8 enclose the rings 5 fandol leaving a space in the center of the grate through i whicliair may` flowV upwardlythrough `the` naga e appar part Granaten@ s p ports may vided witha wall 9 that is closed except for a central opening 10 therein. A disk 1`1`is t ted over said .opening and has a stud 12 that 1s tapped into a hub 13 form-ed in said opening. When the disk is raised7 currents of air may fiow between it andthe walls ofthe opening, the volume of air being governed bythe is in its lower position, the opening will be Vwidth of the space or passage. Then the disk w nearly closed against Vthe passage offair;`

hence,` by adjusting this diskup and downl am able to regulate to anicety the volume of air delivered to the burner. The wall 9 has sockets 14 therein and hollow standards 15f are mounted in said sockets and project up'- wardly therefrom and have portsl near Ytheir Vupper ends through which .auxiliary currents of air are delivered lto the space above the disk 11.` e e I have found the means for delivering the auxiliarycurrents of airat.. intervals around the mixing chamber'is an important feature of the invention as it enables me to provide theproper proportion of rair and obtain` the desired blue-burning flame. The number of vports delivering air horizontally `to the mi 'ing chamberma-y ofcourse be increasedor diminished as desired and. the areaof these be varied lto suit different oondi-` tions of use.

The `upper ends ofthestandards are prefer l ably open, and elbows 17 have studs 18 fitting within said standards, the other ends ofthe elbowsbeing mountedin the wall'ofa retort 19 thatis centrally supported above the disk 11 and a distance therefrom equal substantially to the height ofthe standards-` y"llliisfdistance may be increased-or diminished sired. `.I have found, however,` thata space of 3 to 4 inches issuflicient to producethebest yresults@y The upperfwalllof. the, retort has an open ing QOand. a fiange 21 encircling said opening 'andfacap' 22 bygmeans of Lwhich access is.y

permitted to the interior of the retort; A liquid fuel feed pipe 23 isfmounted at one end lintheQ'ange 21 and yhas a passage 24 therethrough leading to-,the retort and through which the' liquid fuel lis discharged' linto 'the` retort. A supplypipel 25`o`ominunicates with theliquid fuel. feed pipe and is: provided with a regulating .valve 26 and asuitable strainer 27 anni which is; of any or'dinaryerf-preferred eoistrnee-jnng Thelowerwals thectetortm closed by valves 32 and 33, one of said portsA being comparatively small and the other comparatively large and the valves are correspondingly formed to fit the ports. The stems of the valves extend upwardly through the retort and are pivotally connected to a `crank disk S4 that is centrally mounted on the inner end of an operating rod 35 that is preferably concentric with the liquid fuel feed pipe 23; the rod being journaled in the walls ofthe flange 21 and the disk being secured to the rod for rotaryadiustment bysuitable means such as a set screw 36. The connections of the valves with this crank disk are on oppositesides of the axis and consequently whenthe disk is `rotated by the movement of the rod one valve will be opened and the other closed, this movement being performed alternately with the rocking` of the valve-controlling rod. A suitable stuffing-box 87 is provided at the point where the rod 35 passes out of the feed pipe and an operating lever 38 vis mounted on said rod and has its endsattached to flexible connecting means 39 and 40 which extend to the motor of the thermostatic control, the operation of the motor rocking the lever 38 and rotating the rod 35 on its axis to open one of the retort valves and close Vthe other one. Flexible vmeans such as a chain 41 also connects the cable 39 with the draft door 42k of the furnacey so thatA when the larger valve is v opened the draft door will be simultaneously vopened to increase the flow of air to the burner.

The flue 3 has a damper 43 hinged at 44 and provided with a weight 45 which normally tends to, hold the damper in a. closed position, allowing it to open Whenv there is a sufficient suction in the flue to overcome the gravity of the weight. This movement to 'an open position occurs when there is a strong draftl in the chimney and flue and the damper 42 is open and more air is passing tothe burner than isneeded or desired. At such time, the intake of air by the opening of the damper r43 will cut down the flow through and around the burner maintaining theldesired volume under 'different conditions. By increasingl -the weight 45 the damper will not open as readily and a greater volume of air 'will be y,delivered tothe burner beforey the damperin the flue will be affected. In this Way, I am able to'regulate to a nicety the supply of air yto the burner. Y, i Y c f Thewall 9 in the upper part of the fire potl ring has a basin 46 therein thatis adapted to receive any overflow fthe liquid fuel? from overflow pipe 47 communicates with; this basin or pan and leads to a point outside thebeen delivered yto this receptacle it will descend and close the valve, shutting off the supply of fuel to the burner. This device is intendedy as a safeguard against flooding the heater andthe basement with the liquid fuel in case the burner flame should accidentally become extinguished, or should the thermostatic device fail to control the fed and more kized-anddischarged through the valves into the space' beneath the retort where the vapor will be mixed with air passing up around the kdisk 11 and with air discharged through the ports 16. A combustible mixture will thereby be obtained and a blue fiameprovided that l will furnish an intense heat within the furnace with practically complete combustion. Ihenever desired, the diskl 1 1 may be raised or lowered to increase or decrease the air space beneath it and'regulate thereby the volume of air delivered to the mixing chamber. Ihave found that by furnishing asupply of air below the mixing chamber and delivering air at intervals around the chamber that I am able to effect a very complete combustion of the fuel with the desirable blue flame.

As heretofore described, the valves 32 and 33 operate alternately. In mild weather the valve 32 will be opened, delivering a comparatively small supply of fuel tothe mixing chamber. In cold Weather, when the thermostat willr open the drafts of the furnace, the

position ofthe valve will be. reversed -thelarge valve 33 opening and the small valve creasingthe heating 4capacity'of the burner. With this apparatus, no pilot light is necessary. A small flame is burning continuously as long as the'burner kis in use, the valve 32` and its port having the function of the usual pilot light. y

The Wiresv or cables`89 v and 40 lead to ari "operating motor, the movement of whichy is controlled. by ak thermostat in theroom or* space where the ytemperature is to be'regulated; therefore, `the 'lever38 will be actuated by the operation of the motor and the valves changedwhen `thevmotor is started by the disk 11 and the. feed valves above.v An

the closing of a thermostat-ic circuit.V The thermostatic system ofv temperaturev control 1s wellv known and I have not therefore thought it'necessary to illustrate it in detail herein, it kbeing common practice to connect dampers of heaters with la motor that is electrically controlled by the action of a thermostat located at a distant point. c

I claim as my invention: v

l. In a liquid fuel burner, a retort having discharge ports of different size in its bottom wall and corresponding valves for said ports, a rotating rod and a crank disk thereon whereto said valves are connected, the rotation of said rod opening and closing said valves alternatelyto increase or decrease the iiow of fuel to the burner, a base havingk a priming pan and standardsupon said base supporting said retort.

2. In a liquid fuel burner, a base adapted i to be placed on the grate of the heater and having an air passage therein, an air deflector above said passage, a retort supported above said air passage to form al mixing chamber thereunder, means for delivering a liquid fuel to said retort, and a plurality of diiierent sized port-s and regulating valves for deliver-k ing the vaporized fuel into said mixing chamber, the air flowing around said deflector and mingling with the'vaporized fuel.

3. In a liquid fuel burner, a base adapted to be seated onthe grate of the heater and having an air passage therein, hollow standards mounted on said 'base and having discharge ports in their walls, a retort supportedv by said standards, the space beneath said retort and enclosed by said standards forming a mixing chamber, the lower wall of said retort having a discharge port therein, and means for delivering a liquid fuel to said retort, the vapor discharged from said retort mixing with the air flowing upwardly f through said base and discharged laterally from said hollow standards.

4. In a liquid fuel burner, a hase having i and valves for said portsone of said valves being comparatively small and Aforming a pilot light port, said ports delivering the vapor into the space'beneathsaid retort to mix with the air therein, and means for alternately openingand closing said valves and orts. Y p 5. A liquid fuelburner comprising a base portion having a priming pan and an air intake opening and means above said opening for deiiecting the air currents outwardly from said opening, upright hollow standards mounted on said base, a retort supported by said standards and having a fuel intake and a port andrvalve therefor for delivering the vaporized fuel into the mixing chamber between said retort and said air-deflecting means to mingle with the currents of air from said opening, and air ducts in said hollow standardscommunicating with 'an air supply whereby additional air will be delivered to 4said mixing chamber.

Inwitness whereof,I lhave hereunto set my hand this 10th dayvof December, 1923. Y CLYDE M. CLEFTON.

soV 

